Aerospace 7001-T6 alloy for strength and reliability in an affordably priced bolt. Hard anodized for an ultra smooth finish and increased penetration. Factory fletched with 4" vanes. 20" bolts weigh 457 grains and 22" bolts weigh 494 grains (including 100 gr. point). 6 packs include moon and flat nocks. 36 packs available in either moon or flat nocks.